FIGURE 6 in Taxonomic consideration of eight Chinese bisexual Artemia populations, based on the morphology of frontal knob and gonopod and the result of cross-breeding tests

FIGURE 6. Distal gonopod spines of different Artemia populations. (A, B) Gonopods of URM to show the position of spines on distal gonopod (in A, the thickness of finger-like tip is inflated because the specimen is molting and the old skeleton has not been stripped from the finger-like tip). (C, D) Exolateral spines of URM. (E) Posterior spines of URM. (F) Gonopod of SAL to show the position of spines on distal gonopod. (G) Posterior spines of SAL. (H) Exolateral spines of SAL. (I) An exolateral spine of SAL with bifurcated tip. (J) Gonopod of SFB to show the position of spines on distal gonopod. (K, L) Exolateral spines of SFB. (M) A spine located on the anterior surface of distal gonopod of SFB. (N) Gonopod of PER to show the position of spines on distal gonopod. BG = basal gonopod; BGS = basal gonopod spine; DG = distal gonopod; ES = exolateral spines; FT = finger-like tip; PS = posterior spines. Abbreviations of Artemia populations see Table 1. Scale bars: A, B, F, J and N = 50 µm; C, E, G, H and I = 10 µm; D, K, L and M = 5 µm.